Commercially available bugging and spy devices include USB flash drive voice recorders, pocket voice and phone recording devices, recording devices for an entire room and listening and recording devices hidden in clocks, a computer mouse and a power strip. These listening devices record between two and four-hundred hours of sound.
Manufacturers of bugging equipment include companies such as Velpro, Micro Gadgets, Tech Street Mall and DPL. There are also large, parabolic listing dishes for both medium- and long-range listening. These devices include portable carrying cases and are designed to pick up specific sound frequencies when planting smaller, in-room bugging devices is not possible.